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B
60cm2
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C
10cm2
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D
100cm2
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Solution
The correct option is A90cm2 Consider the following figure: Area of the figure ABGFED = (Area of square ABCD) - (Area of rectangle CEFG) ⇒(AB)2−[(GF)×(FE)] =(10cm)2−[(2cm)×(5cm)] ⇒(100cm2)−(10cm2)=90cm2